Because of its 16 processing units, Sun refers to Rock as a hexadeca-core CPU. Rumor has it that the processor will support a total of at least 32 threads and run in server systems with up to 256 TB of memory. Earlier in April, Sun said that it will soon provide more data about Rock as well as its vision for "the golden age of effortless parallel programming."

Among the Rock details released so far is a 2395-pinout, in which 812 pins are used for signal processing and 1514 pins are used for power/ground. The remaining 69 pins are unused.